Flop value raise is fine, although I'd make it more like 1.80 or about there. Don't do 3x his bet postflop, look at pot size and make you bet/raise relative to that.

Turn, I would usually value raise again. Yes, it's thinner but there's still value from many worse hands and you usually get a free showdown since your hand is worth just one more street of value in general.

As played, I'm tempted to say river is a fold. A2, A4. A3. A4 all make sense for him, possibly some hands like Ax of spades or clubs too. I would call just my Ax hands I bluff raise flop with or better, maybe KK/QQ is a call too but I think QT is too weak to call here even with those odds since you don't know his range well at all.